ATMEGA162_1 Datasheet, PDF (322/324 Pages) ATMEL Corporation – 8-bit Microcontroller with 16K Bytes In-System Programmable Flash

Analog Comparator 195
JTAG Interface and On-chip Debug System 197
Features 197
Overview 197
Test Access Port – TAP 197
TAP Controller 200
Using the Boundary-scan Chain 200
Using the On-chip Debug system 201
On-chip debug specific JTAG instructions 202
On-chip Debug Related Register in I/O Memory 202
Using the JTAG Programming Capabilities 202
Bibliography 203
IEEE 1149.1 (JTAG) Boundary-scan 204
Features 204
System Overview 204
Data Registers 205
Boundary-scan Specific JTAG Instructions 206
Boundary-scan Chain 208
ATmega162 Boundary-scan Order 213
Boundary-scan Description Language Files 216
Boot Loader Support – Read-While-Write Self-programming 217
Features 217
Application and Boot Loader Flash Sections 217
Read-While-Write and No Read-While-Write Flash Sections 217
Boot Loader Lock Bits 219
Entering the Boot Loader Program 221
Addressing the Flash During Self-programming 223
Self-programming the Flash 224
Memory Programming 231
Program And Data Memory Lock Bits 231
Fuse Bits 232
Signature Bytes 234
Calibration Byte 234
Parallel Programming Parameters, Pin Mapping, and Commands 234
Parallel Programming 236
Serial Downloading 245
SPI Serial Programming Pin Mapping 245
Programming via the JTAG Interface 250
iv ATmega162/V
2513K–AVR–07/09